During World War II, American comic-book publishers produced a spate of patriotic, Nazi-fighting superheroes. One of the most popular was Timely Comics’ Captain America. In the hero’s first Captain America story, by writer Joe Simon and illustrator Jack Kirby, anemic student Steve Rogers is offered the opportunity to join the war effort by taking an experimental serum, which pushes his strength, agility, and endurance to the peak of human performance. Armed with an indestructible shield, Captain America wages war against Nazi super-villain the Red Skull.

The series continued for several years after the war but was canceled in 1949. Captain America returned to the mainstream of what is now Marvel Comics in 1964, when the superhero group the Avengers discovered him beneath the ocean, frozen in suspended animation. Revived, he joined and eventually led the group, fighting various criminals with his superpowers.

As the 20th century progressed, Captain America and his plotlines reflected the political and cultural evolution of the United States. Stories from the 1960s showed Captain America struggling to understand the Vietnam-era counterculture. In later decadesto come, writers such as Mark Gruenwald and Ed Brubaker often had him clashing with the government while remaining fundamentally a patriot. In a 2006–07 story line he defended civil liberties by leading an underground resistance against the government’s attempt to register and regulate costumed superheroes. The conclusion of that story saw the apparent assassination of Steve Rogers at the hands of agents of the Red Skull. A number of costumed heroes filled the role of Captain America over the following years, but Rogers—revealed to be alive and newly emerged from a state of regenerative hibernation—resumed his mantle as the Star-Spangled Avenger in a relaunch of his comic book in 2009. Although Captain America has long been a cultural icon, the few attempts to bring him to television and film were unsuccessful and were quickly forgotten.